KR20170097685A - A method and device for generation of hydrogen peroxide - Google Patents

Abstract

A method and device for the generation of hydrogen peroxide operating according to the principle of carrying an air-liquid or vapor stream through a corona discharge region in air. Such devices can be used for sterilization of air and various objects for industrial and household uses.

Description

METHOD AND DEVICE FOR GENERATION OF HYDROGEN PEROXIDE FIELD OF THE INVENTION [0001]

The present invention relates to methods and devices for the production of hydrogen peroxide which operate in accordance with the principle of carrying an air-liquid or vapor stream through a corona discharge region in air.

CN 1011569515 discloses a non-equilibrated plasma type spray sterilizing microbicide production device consisting of a main unit and a plasma spray head. The high voltage potential difference between the metal electrodes in the plasma spray head is used to form a corona discharge with a minimum distance between the metal electrodes. The corona discharge is driven by the air-water mixture produced by the spray nozzle, sliding rapidly down the electrode surface and forming a pulse-type sliding arc discharge non-equilibrated plasma on the electrode surface. An air-water mixture containing hydrogen peroxide, ozone, oxygen free radicals, oxygen free radicals, and other oxidizable particles is produced and sprayed from the insulator case to form an air-water spray disinfecting microbicide.

It is also known to produce an air-liquid spray using an air compressor which carries the air at high speed (50-100 m / sec) through the corona discharge area.

The flow carried through the corona discharge area contains hydrogen peroxide (H ₂ O ₂ ) and ozone (O ₃ ) delivered to the sterilized object. A drawback of such a method is that the ozone portion is dissolved in the liquid while the remainder is in the air stream.

In addition, an approach is known in which the air-liquid spray is regenerated by an air compressor and carried through a corona discharge region, but then separated into air and liquid hydrogen peroxide containing undissolved ozone in the liquid.

To remove ozone, air can be carried through an activated carbon filter.

A common drawback of the prior art is the limited field of application resulting from the need for air compressors.

It is therefore an object of the present invention to provide a method and device for producing hydrogen peroxide which overcomes the disadvantages of the prior art.

This object is achieved by first using the well-known ultrasonic generation method in water to produce cryogenic vapors to be used as air-liquid streams, avoiding the use of expensive compressors.

Unlike air-liquid flow generation by air compressors associated with jet technologies, cryogenic vapor generation can be associated with "cloud technology ", which means that if the external source is not used to create a pressure drop, Cloud vapors are generated under normal pressure. Pan is generally used as such a source.

The proposed method is based on the use of a hollow rotor which simultaneously performs three functions.

1. act as one of the electrodes used to create the corona discharge area;

2. Create a discharge area for low temperature vapor transfer to the corona discharge area;

3. Act as liquid and air separator using centrifugal force generated by rotor rotation.

At least a portion of the rotor or rotor is made of a conductive material.

Another electrode coated with an insulator is mounted inside the rotor cavity.

Power from the high voltage AC source is applied from one of the terminals to the rotor via capacitive coupling while the second terminal is connected directly to the second electrode. In this way, a straight segment of the corona discharge is created between the rotor and the second electrode insulator.

The distance between the inner diameter of the rotor and the outer diameter of the second electrode insulator is determined from consideration of the required corona discharge current generated at a predetermined magnitude of the high AC voltage.

A rotor having a shape as a centrifugal fan rotor rotates around the second electrode. The corona discharge area also rotates.

As discussed above, the cryogenic vapor enters the corona discharge region and rotates within the corona discharge region.

The rotational speed of the rotor and corona discharge region is much higher than the rotational speed of the cryogenic steam due to the strong impact of the vapor phase corona discharge. This is strongly influenced by the corona discharge.

Vapor separation into liquid and air using the centrifugal force generated by the rotor is obtained by changing the direction of low temperature vapor transmission by 90 DEG through a straight segment of corona discharge between the electrodes. The angle may vary slightly depending on the electrode configuration.

One of the advantages of the proposed H ₂ O ₂ generation process is the increase in H ₂ O ₂ concentration when hydrogen peroxide generated at the generator outlet in liquid form is used to generate steam entering the generator. To do this, the generator outlet is connected to a container of liquid intended to be transformed into vapor.

In practice, the concentration increases due to the proportional increase in generator operating time.

A device according to the invention for producing hydrogen peroxide (H ₂ O ₂ ) comprises: a cylindrical body having a low temperature steam inlet and air from the body and H ₂ O ₂ outlets, a bypass air channel, A rotor plate of an air capacitor fixed to the shaft and a rotor forming a centrifugal fan with the motor and body form, an insulator having electrodes mounted inside the rotor cavity, and a high AC voltage supply.

To understand the present invention and to see how it may be carried out in practice, reference will now be made, by way of non-limitative example, with reference to the accompanying drawings, in which:

To understand the present invention and to see how it may be carried out in practice, reference will now be made, by way of non-limitative example, with reference to the accompanying drawings, in which:
1 is a schematic diagram illustrating a device for producing hydrogen peroxide in accordance with the present invention.
Figure 2 is a partial cross-sectional view of line AA in Figure 1;

1 shows a device for producing hydrogen peroxide including the housing 1 towards the upper end where the electric motor 2 having the power terminals 3 and the shaft 4 is mounted. The air capacitor is formed of an annular electrostatic plate 5 (constituting the first electrode) which is supported on the upper end of the housing and on the rotor plate 6 side, which is attached to the motor shaft 4 together with the hollow rotor 9 . And the air outlet 7 is provided on the upper end side of the housing. The insulator 10 including the electrode 11 constituting the second electrode is fixedly mounted inside the hollow rotor 6. The low temperature steam inlet 12 and the H ₂ O ₂ outlet 13 are formed in the lower portion of the housing 1. The air outlet (7) is connected to the low temperature steam inlet (12) through a bypass channel (8). The high voltage AC supply 14 supplied by the input terminals 15 has a first electrode configured by the electrostatic plate 5 of the air capacitor and outputs connected to the second electrode 11. [

The device operates as follows. When electric power is applied to the terminals 3 of the motor 2, the motor shaft 4 rotates together with the rotor plate 6 and the rotor 9 of the air condenser, (4). Energized to the electrostatic plate 5 and the second electrode 11 of the air capacitor when power is applied to the terminals 15 of the high AC voltage supply 14. [ In this manner, the high voltage AC is applied to the second electrode 11 and the rotor 9 enclosed in the insulator 10 via an air capacitor.

The barrier corona discharge region shown in FIG. 2C is created between the insulator 10 and the rotor 9 and is rotated with the rotor 9 relative to the fixed insulator 10. At the same time, the low pressure region generated between the rotor 9 and the insulator 10 is sucked in the low temperature vapor from the steam inlet 12 to the corona discharge region C. The steam passing through the corona discharge area is converted to hydrogen peroxide (H ₂ O ₂ ) and changes the initial flow direction in the region by 90 °.

2, it can be seen that the corona discharge region C is located within the annular space between the inner diameter D1 of the rotor 9 and the outer diameter D2 of the insulator 10 surrounding the second electrode 11 . The distance between D1 and D2 is determined from consideration of the required corona discharge current generated at a predetermined magnitude of the high AC voltage.

Since centrifugal forces are created during the rotation of the rotor 9, large groups of liquid molecules constituting the vapor are discharged into the cylindrical inner walls of the housing 1 which form droplets of H ₂ O ₂ flowing along the inner walls, Is removed from the device through the H ₂ O ₂ outlet (13) in the lower portion of the chamber (1).

As a result of the liquid separation process described above, air containing a certain amount of vapor (H ₂ O ₂ ) and ozone (O ₃ ) that is not dissolved in the liquid remains in the device. The release of air containing these components from the device is undesirable. Therefore, air exiting the air outlet 7 is carried through the bypass channel 8 to the low temperature vapor inlet 12, which allows vapor injection into the device 10.

By such means, the recirculated air circulates in the enclosed space inside the device, thereby alleviating the need for an activated carbon filter and simplifying the design and maintenance of the device.

The basic form of a device constructed using the proposed method has the following specifications:

Insulator material Glass The distance between the insulators of the first electrode and the second electrode 1mm Rotor rotation speed 6000 RPM AC voltage source amplitude ± 7 kV AC voltage source frequency 40 kHz Steam consumption 300 mL / h H ₂ O ₂ concentration at generator outlet 100 ppm

Claims (16)

A method for producing hydrogen peroxide (H ₂ O ₂ )
Conveying an air-liquid or vapor stream through a corona discharge region created by applying a high AC voltage (14) between two electrodes (5, 11)
Wherein the angle of the flow direction changes at a passage course in a straight segment of the corona discharge region. The method according to claim 1,
Wherein one of the electrodes (11) is mounted in a hollow rotor (9) and the rotation of the hollow rotor (9) forms a centrifugal force. The method of claim 2,
Wherein at least a portion of the rotor (9) is made of an electrically conductive material. The method according to claim 1,
Wherein the high AC voltage is coupled to the rotor through capacitive coupling. The method according to claim 1,
Wherein the second electrode (11) is surrounded by an insulator (10) and is located inside the hollow of the hollow rotor. The method of claim 5,
Wherein the rotor is rotated relative to the second electrode. The method according to claim 1,
Wherein the inner diameter of the hollow rotor is displaced from the outer diameter of the insulating coating of the second electrode by a predetermined interval, the length of which is selected to induce the required corona discharge current at a predetermined magnitude of the high AC voltage Lt; / RTI > The method according to claim 1,
To increase the concentration of H ₂ O ₂ , liquid hydrogen peroxide is recycled at least once to produce an air-liquid or vapor flow through the corona discharge region. A device for producing hydrogen peroxide,
A housing (1) having an inlet (12) for air-liquid or steam supply and separate outlets (13, 7) for H ₂ O ₂ and air effluent,
First and second electrodes (5, 11) positioned to allow said air-liquid or vapor flow, and
And a high AC voltage supply (14) configured to generate between the electrodes a corona discharge region connected to the first and second electrodes and having a straight segment (5)
Wherein one of the first and second electrodes changes the direction of the air-liquid or vapor flow within the straight segment of the corona discharge region. The method of claim 9,
Wherein the electrode for changing the direction of the air-liquid or vapor flow is formed inside the hollow rotor (6). The method of claim 10,
Wherein at least a portion of the rotor is made of an electrically conductive material. The method of claim 10,
Wherein the high AC voltage is coupled to the rotor via capacitive coupling. The method of claim 10,
Wherein the second electrode is surrounded by an insulator and is disposed within a cavity of the hollow rotor. 14. The method of claim 13,
Wherein the rotor is configured to rotate relative to the second electrode. 14. The method of claim 13,
Wherein the inner diameter of the rotor is displaced from the outer diameter of the insulator by a predetermined interval and the length thereof is selected to induce the required corona discharge current at a predetermined magnitude of the high AC voltage. The method of claim 9,
Wherein the air outlet and the air-liquid or vapor inlet inlet are connected by a bypass channel.

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